Command Line Interface
4-78
4
Command Usage
• In some countries or regions, clocks are adjusted through the summer months
so that afternoons have more daylight and mornings have less. This is known
as Summer Time, or Daylight Savings Time (DST). Typically, clocks are
adjusted forward one hour at the start of spring and then adjusted backward
in autumn.
• This command sets the summer-time time relative to the configured time
zone. To specify the time corresponding to your local time when summer time
is in effect, select the predefined summer-time time zone appropriate for your
location, or manually configure summer time if these predefined
configurations do not apply to your location (see
clock summer-time
(date)
on page 4-76 or
clock summer-time
(recurring) on page 4-78).
Example
Related Commands
show sntp (4-70)
(recurring)
This command allows the user to manually configure the start, end, and offset times
of summer time (daylight savings time) for the switch on a recurring basis. Use the
no
form to disable summer-time.
Syntax
clock summer-time
name
recurring
b-week b-day b
-
month b-hour b-minute
e-week e-day e
-
month e-hour e-minute offset
no clock summer-time
• name -
Name of the timezone while summer time is in effect, usually an
acronym. (Range: 1-30 characters)
• b-week
- The week of the month when summer time will begin. (Range: 1-5)
• b-day
- The day of the week when summer time will begin. (Options:
sunday
|
monday
|
tuesday
|
wednesday
|
thursday
|
friday
|
saturday
)
• b-month
- The month when summer time will begin. (Options:
january
|
february
|
march
|
april
|
may
|
june
|
july
|
august
|
september
|
october
|
november
|
december
)
Table 4-19 Predefined Summer-Time Parameters
Region
Start Time, Day, Week, & Month
End Time, Day, Week, & Month
Rel. Offset
Australia
00:00:00, Sunday, Week 5 of October 23:59:59, Sunday, Week 5 of March
60 min
Europe
00:00:00, Sunday, Week 5 of March
23:59:59, Sunday, Week 5 of October
60 min
New Zealand 00:00:00, Sunday, Week 1 of October 23:59:59, Sunday, Week 3 of March
60 min
USA
02:00:00, Sunday, Week 2 of March
02:00:00, Sunday, Week 1 of November
60 min
Console(config)#clock summer-time MESZ predefined europe
Console(config)#
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